What does a #"mole"# signify? How does the molar quantity relate to the molar mass of carbon dioxide?
One mole of substance specifies
If I have one mole of carbon dioxide, I have
The mole is thus the link between the micro world of atoms and molecules, which we cannot see, to the macro world of grams, and litres, which we as chemists can certainly measure effectively.
Given a mass of substance and its formula we can tell the number of individual particles that constitute that mass. This is worthwhile getting stuck in your head now, because if you can master it, you will succeed in A level chemistry.